Seiko Cal. 7138 - 939

The 7138-939 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7138 caliber with 17j jewels beating at 28,800 bph, it delivers a 44 hours power reserve. [seikata-wm-057a04432dac]

Also known as: Emperor

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

13.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Cream

Jewels

17j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1978

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